I know this might not be what you want to hear, but it's always best to research magic and its dangers/positives before trying to cast a spell. You should also look up what's possible in magic and what isn't, like transforming into wereeolfs/vampires/mermaids ect. There are lots of articles around the site on this. Like many people say, magic isn't something to mess around with so ide make sure your certain about casting a spell. And just to inform you, I don't believe the first spell is possible however I could be wrong. And the second one, well I recommend reiki, that can heal pain.
Hope I helped, have a lovely day. - Rowan